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<title>Macro BOOST_PROTO_ASSERT_MATCHES</title>
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<h2><span class="refentrytitle">Macro BOOST_PROTO_ASSERT_MATCHES</span></h2>
<p>BOOST_PROTO_ASSERT_MATCHES — 
      Assert at compile time that a particular expression
      matches the specified grammar.
    </p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="proto/reference.html#header.boost.proto.debug_hpp" title="Header &lt;boost/proto/debug.hpp&gt;">boost/proto/debug.hpp</a>&gt;

</span>BOOST_PROTO_ASSERT_MATCHES(expr, Grammar)</pre></div>
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<a name="id-1.3.34.5.7.9.4"></a><h2>Description</h2>
<p>
        Use <code class="computeroutput">BOOST_PROTO_ASSERT_MATCHES()</code> to assert at compile-time that
        an expression matches a grammar.
      </p>
<p>
        <span class="bold"><strong>Example:</strong></span></p>
<pre class="programlisting"><span class="keyword">typedef</span> <a class="link" href="boost/proto/plus.html" title="Struct template plus">proto::plus</a><span class="special">&lt;</span> <a class="link" href="boost/proto/terminal.html" title="Struct template terminal">proto::terminal</a><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span><span class="special">,</span> <a class="link" href="boost/proto/terminal.html" title="Struct template terminal">proto::terminal</a><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">PlusInts</span><span class="special">;</span>

<span class="identifier">BOOST_PROTO_ASSERT_MATCHES</span><span class="special">(</span> <a class="link" href="boost/proto/lit.html" title="Function lit">proto::lit</a><span class="special">(</span><span class="number">1</span><span class="special">)</span> <span class="special">+</span> <span class="number">42</span><span class="special">,</span> <span class="identifier">PlusInts</span> <span class="special">)</span><span class="special">;</span></pre>
<p>
      </p>
<p>
        See also:
        </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><code class="computeroutput"><a class="link" href="boost/proto/assert_matches.html" title="Function template assert_matches">proto::assert_matches</a>()</code></li>
<li class="listitem"><code class="computeroutput"><a class="link" href="boost/proto/assert_matches_not.html" title="Function template assert_matches_not">proto::assert_matches_not</a>()</code></li>
<li class="listitem"><code class="computeroutput"><a class="link" href="BOOST_PROTO_A_1_3_34_5_5_4.html" title="Macro BOOST_PROTO_ASSERT_MATCHES_NOT">BOOST_PROTO_ASSERT_MATCHES_NOT</a>()</code></li>
</ul></div>
<p>
      </p>
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<td align="right"><div class="copyright-footer">Copyright © 2008 Eric Niebler<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
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